1. an extremely hard blue-black crystalline compound (SiC) used as an abrasive and a heat refractory material; crystals of silicon carbide can be used as semiconductors. 
   一种极为坚硬的蓝黑色晶状化合物（sic），用作研磨剂，高温难溶材料，金刚砂石英可以用作半导体。
2. An extremely hard, highly refractive crystalline form of carbon that is usually colorless and is used as a gemstone and in abrasives, cutting tools, and other applications. 
   钻石一种极其坚硬，高折射率的结晶形状的碳素，常常近于无色，被当作宝石并用于研磨、切割工具以及其它用途上
3. A finely chiseled nose. 
   轮廓清秀的鼻子
4. A finely woven rug. 
   织得很漂亮的一块小地毯
5. sew together very finely. 
   细微美好地缝在一起。

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• 1. 隐晶质
  extremely feeble 极度虚弱...extremely finely crystalline 隐晶质...extremely hard conditions 最恶劣的条件
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